I'm thinking about trying a bloog battery. My main question is.....is it the same thing as a V4L battery? Is it really any better or different in some way. Also, I've been a V4L customer from day 1 and don't really want to change or purchase everything, at least not right away, so will the bloog battery work with the V4L cartos, and what about the charger? Thanks for any advice you have.